Lock switch



LOCK swITcH Filed Dec. 11, 1939 2 sheets-sheet 1 E. N.r JAcoBl 2,264,980

E. N. JAcoBi 2,264,980

LOCK SWITCH Filed Dec. ll, 1939 2 Sheets-Sheet 2 lthe assembly1 projectvPatented Dec. 2, 1941 Vrowers N.

Jacobi; Milwaukee, Wis., assigner to.

Briggs &. Stratton roruoration,..liiilwaulree,p WisnaicorpcrationnofDe.InwardV 1 Application December 11, 1939; Seri-al No. 308,664

. 5 Claims.. (C

5 t'ally, as. hereinafter. described andK more pard This, invention..relates.. to. lock.. switches. and refers.l particularly. to, ignition.coil switch locks for useon automobiles..

As. a safeguard, against theft by shunting out the lock controlledignition switch, it is cus.- tomary to encase the switch and the lockcylinder by which the switch. is actuated. inV a. hardened. metal casingfor body This. precludes. defeating the lock in the. man-ller'notedhut.leaves the. switch vulnerable toI unauthorized actuation by removing thelock cylinder. Removablecyleinders areV a necessityY in the-present day.lock equipment of automobiles. but the. cylinder, retaining.V devices.heretofore in useewere ynot appro.- priate for wherein, the: outer.lcasing, is` hardened.

' It is, therefore, anobject of. this invention-to provide an improvedcylinder` device by which. the cylinder is removably secured. inposition.

A further-object of; this invention is td provide a strong cylinderretaining.;` means.- which; is Yso designed that removal of; thevcylinder is impossib-le in its locked position of rotation.

More specifically, it is. aruobieet off tion. toprovide newand. improvedmeans.' for' seicuisine` the cylinderV in place `which. comprises a pin.or1 other abutrne t: x:emcvably earriedjby the body `of the lock. andengaeine'in. an :arcuate groove. in the cyiinden. and wherein.interchange casinal or bedrei theleok ying` means on the: pinorabutment, and. the cyl;- inder preclude removal of the pin when thecyl-.- index2-is: in its lockedpcsition of rotation.

In switch combinations of this type;l thevout.- side dimensions: of thatportion of: the housing which encases the. switch. cannot be; very'easily reduced to the. diameteroi theahousng- Palit which containstheloclr` cylinder.. Space. refillkitments, however,` often demand thatno; part of below the periphery of.' th` io'repartof the body mounted.This requires theswitch to. be mountedf` eccentrically wth respect. to.thev axis. of the cylinder which introduces diicultiesfinthe drtvetransmission from the cylinder'to the rotaryfcorrtaeter of the switch.

The present invention, therefore, has, an;- other of its objects, theprovision of `a new and improved manner of drivingly connecting thecylinder and contactor in constructions of this t' e.

JIlVith the above and other objects in view, which will appear as thedescription proceeds, this invention resides in the novel construction,Vcombination and arrangement of parts substanlock.` switch combinations.of this type ...l

inven.- Y

in which the cylinder rs r.. ro-ese).

ticularly deued'by the. appended; @aimait being understood that suchchangesin the precise ernbodiment ofthe herein disclosed invention maybe. mariees come within thescope. oi the` claims. l The accompanyingdrawings illustrate. lone complete. example of the` physlcal'jembodrnent'Ofi the invention constructed according, to,.th.e best. xno'cle so,farv devised for. the. practical applications.. of the principlesthereof.- and inv which: Figure.. 1 is a view. substantiallylongitudinal section through alock switch constructed in ac.-.eordeneejwith invention; Eigure 2 is a, cnossssectional. viewtakenthrough Figure; on the. Plane of. theline Zfz;

Eigure. is a. crosssectional, viewI taken through Figure 1 on. the.plane oi the line. 3er-3;. Figure 4.. issa. view, similar toFiaure, 3Ibut. illus- .tlratinegr the partsturned to another-switch. posi! Figure5 is a, perspectiyeview of `the lock body or easing); Y f Figure.- disar Perspective view of the lool: cylinder; and. Y Figure "1.A 'paperspective View of, the. .Swtehpel vse: and: illustrati-ne:nat-ticularlrr the manner in which the rotary contacter is driven. y

Reierrinenew particularly Ytothe.. aeeomnany- `ias drawings. .bien like;numerals indicate like nar-ts..` the, numeral.. '.i designates outerswitch. which formed of hardened metal, preferably steel. andv a .fbore6; in ts'iront; end ier" the reception; of; a lock; cylinder l and an;enlargedv circular cavity 'or bore- 8: in,y its rear.` end` to. receivethe.: switch designated generally bythe numeral. 9. rvThese ttwobores-aref offset. axially so that. at one side of the casina'the outerwalrforms; substantially a, straightline.

suitable means, such as an annular flange Mt and; a nut Il threaded' onthe outer end ofthe "casing, is provided forsecuring: the casingt'o avmountingpanel I- 2.-

ljhe 'lockcylinder isi of customary typehaving` t-'unrblers*t3V whichproject a lockingbar [4 radial-ly'from the cylinderV to engage ina slotI5 formed in aimer. O1' .bushing l6 securedinthe here .6.. 'llhejtumblers. are,v retractable 'unanime insertion of a proper key I1,whereupon the locking bar is retracted out of the groove or slot to freethe cylinder for rotation.

The cylinder is removably secured in position by a locking pin I8consisting of an outer screw 55 portion threaded into a tapped hole inthe side wall of the body, and an inner headed end I9. This headed innerend projects into an arcuate groove 20 in the adjacent portion of thecylinder and thereby secures the cylinder against withdrawal.

To guard against unauthorized removal of the cylinder, a ledge 2|extends from each side wall of the arcuate groove 20 at that portion ofthe cylinder which aligns with the retaining pin when the cylinder is inits locked position of rotation. These ledges 2l thus engage under thehead of the pin IS and prevent removal thereof when the cylinder is inits locked position.

Rotation of the cylinder in either direction from its locked positionwhich,'of course, necessitates the use of the proper key permits removalof the retaining pin and consequently withdrawal of the cylinder.

The switch 9 is of conventional design having a base 22 of insulatingmaterial upon which the stationary contacts and terminals are mounted.One of these terminals has an armored conductor 23 connected thereto andleading to the ignition coil.

The contacts mounted on the base 22 are selectively electrically bridgedby a contactor 25 rotatably mounted on a stud 26 secured to the base.This stud is coaxial with the switch; and inasmuch as the switch ismounted in the bore or cavity 8 of the housing,4it follows that therotary contactor is constrained to rotation about an axis offset withrespect to that of the lock cylinder.

'I'he driving connection from the lock cylinder to the rotary contactercomprises an insulated drlver.2l also mounted on the stud 26 andprovided with driving ears 28 which engage between suitable abutments 29on the contacter,

A compression spring 30 coniined between the insulated driver and thecontactor provides contact pressure and holds the parts againstrattling.

Engaged over the outer end of the driver 21 is a cup-shaped metalstamping 3l. Two diametrically opposed tangs or lugs 32 and 33 extendedfrom the edge of the stamping engage in notches formed in opposite sidesof the driver so that the stamping is nonrotatably connected therewith.Y

The end or bottom wallv34 of the cup-shaped stamping is spaced from thewall of the driver and, as clearly shown in Figure l, is directlyadjacent to the inner end of the lock cylinder. An aperture 35 in thiswall ofthe stamping is so shaped as to provide internal gear teeth 36.These teeth are radial to the axis of the contactor and extend tosubstantially the periphery of the cup-shaped stamping.

A projection 31 on the inner end of the lock cylinder enters thisaperture and is shaped to be readily apparent that this inventionprovides a substantial improvement in lock switch combinations.

What I claim as my invention is:

1. In a cylinder lock: a body having a bore; a cylinder rotatablymounted therein; means for removably securing the cylinder in the boreof the body comprising, an arcuate groove in the cylinder, and a headedpin removably secured in the body and entering the groove to prevent re-`moval of the cylinder; and a ledge on the cylinprovide a plurality ofexternal gear teeth 38 radial to the axis of the cylinder and having apitch diameter less than that of the internal gear teeth so that theteeth mesh when the parts are properly assembled. A simple eiiicientdriving connection is thus established between the cylin- .y

der and the rotary contacter, vnotwithstanding the axially oisetrelationship between these elements.

From the foregoing description taken in connection with the accompanyingdrawings, it will kder projecting into the groove and engageable underthe head of the pin in the locked position of rotation of the cylinderto prevent withdrawal of the pin from the body as long as the cylinderremains in its locked position of rotation.

2. In a cylinder lock: a bored body; a lock cylinder rotatable in thebore; a portion of said cylinder having an arcuate groove formedtherein; a headed pin removably carried by the lock body, with its headentering the groove to prevent axial removal of the cylinder from thebody; and means on the cylinder projecting into the groove andengageable under the head of the pin in the locked position of thecylinder to prevent removal of the pin.

3. In a cylinder lock: a body having a bore; a cylinder rotatabletherein and having a part provided with an arcuate groove; a cylinderretaining pin removably secured in the body and projecting into thearcuate groove; a head on the inner end of said pin inside the groove;and means carried by the cylinder to move with the cylinder throughoutits range of rotation and engaging under the head of the pin when thecylinder is in its locked position of rotation to prevent removal of thepin in said locked position of the cylinder.

4. In a cylinder lock: a bored body; alock cylinder removably mounted inthe bore oi the body; and means for4 removably securing thecylindergtherein comprising, spaced walls on the cylinder defining anarcuate groove, a retaining pin removably secured in the lockbody withits inner end projecting into the groove to secure the cylinderin placeas long' as the pin is in position, and interengaging means on the pinand the cylinder effective in the locked position of the cylinder forpreventing removal 'of the pin so that disassembly of the partsnecessitates turning the cylinder away from its locked position ol.'rotation.

5. In a cylinder lock: a bored body; a lock cylinder removably mountedin the bore of the body; and means for removably securing the cylindertherein comprising, spaced walls on the cylinder dening an arcuategroove, a retaining pin removably secured in the lock body with itsinner end projecting into the groove to secure the cylinder in place aslong as the pin is in position, a head on the pin inside the arcuategroove, and an obstructing ledge on the cylinder projecting into thegroove and engaging under the head of the pin in the locked position ofthe cylinder so that diassembly of the parts necessitates turning thecylinder out of its locked position of rotation.

EDWARD N. JACOBI.

